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体验新版 GitCode,发现更多精彩内容 >>
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8c7d0077
编写于
2月 19, 2017
作者:
V
Vadim Petrochenkov
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电子邮件补丁
差异文件
Avoid ICE in Self::Assoc in impl headers
上级
bf95c29c
变更
2
隐藏空白更改
内联
并排
Showing
2 changed file
with
16 addition
and
1 deletion
+16
-1
src/librustc_typeck/astconv.rs
src/librustc_typeck/astconv.rs
+13
-1
src/test/compile-fail/resolve-self-in-impl.rs
src/test/compile-fail/resolve-self-in-impl.rs
+3
-0
未找到文件。
src/librustc_typeck/astconv.rs
浏览文件 @
8c7d0077
...
...
@@ -918,7 +918,19 @@ pub fn associated_path_def_to_ty(&self,
(
_
,
Def
::
SelfTy
(
Some
(
_
),
Some
(
impl_def_id
)))
=>
{
// `Self` in an impl of a trait - we have a concrete self type and a
// trait reference.
let
trait_ref
=
tcx
.impl_trait_ref
(
impl_def_id
)
.unwrap
();
// FIXME: Self type is not always computed when we are here because type parameter
// bounds may affect Self type and have to be converted before it.
let
trait_ref
=
if
impl_def_id
.is_local
()
{
tcx
.impl_trait_refs
.borrow
()
.get
(
&
impl_def_id
)
.cloned
()
.and_then
(|
x
|
x
)
}
else
{
tcx
.impl_trait_ref
(
impl_def_id
)
};
let
trait_ref
=
if
let
Some
(
trait_ref
)
=
trait_ref
{
trait_ref
}
else
{
tcx
.sess
.span_err
(
span
,
"`Self` type is used before it's determined"
);
return
(
tcx
.types.err
,
Def
::
Err
);
};
let
trait_ref
=
if
let
Some
(
free_substs
)
=
self
.get_free_substs
()
{
trait_ref
.subst
(
tcx
,
free_substs
)
}
else
{
...
...
src/test/compile-fail/resolve-self-in-impl.rs
浏览文件 @
8c7d0077
...
...
@@ -18,9 +18,12 @@ impl<T: Tr<Self>> Tr<T> for S {} //~ ERROR `Self` type is used before it's deter
impl
<
T
=
Self
>
Tr
<
T
>
for
S
{}
//~ ERROR `Self` type is used before it's determined
impl
Tr
for
S
where
Self
:
Copy
{}
//~ ERROR `Self` type is used before it's determined
impl
Tr
for
S
where
S
<
Self
>
:
Copy
{}
//~ ERROR `Self` type is used before it's determined
impl
Tr
for
S
where
Self
::
Assoc
:
Copy
{}
//~ ERROR `Self` type is used before it's determined
//~^ ERROR `Self` type is used before it's determined
impl
Tr
for
Self
{}
//~ ERROR `Self` type is used before it's determined
impl
Tr
for
S
<
Self
>
{}
//~ ERROR `Self` type is used before it's determined
impl
Self
{}
//~ ERROR `Self` type is used before it's determined
impl
S
<
Self
>
{}
//~ ERROR `Self` type is used before it's determined
impl
Tr
<
Self
::
Assoc
>
for
S
{}
//~ ERROR `Self` type is used before it's determined
fn
main
()
{}
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